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method-extraction refactoring in Tiler.

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rachytski 2011-10-03 13:35:33 +03:00 • committed by Alex Zolotarev
parent 24193578f0
commit 28907f0186
2 changed files with 56 additions and 25 deletions
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78
map/tiler.cpp
View file

@ -63,41 +63,61 @@ bool operator<(Tiler::RectInfo const & l, Tiler::RectInfo const & r)
return l.toUInt64Cell() < r.toUInt64Cell();
}
int Tiler::drawScale(ScreenBase const & s) const
{
ScreenBase tmpS = s;
tmpS.Rotate(-tmpS.GetAngle());
m2::RectD glbRect;
m2::PointD pxCenter = tmpS.PixelRect().Center();
tmpS.PtoG(m2::RectD(pxCenter - m2::PointD(m_scaleEtalonSize / 2, m_scaleEtalonSize / 2),
pxCenter + m2::PointD(m_scaleEtalonSize / 2, m_scaleEtalonSize / 2)),
glbRect);
return scales::GetScaleLevel(glbRect);
}
int Tiler::tileScale(ScreenBase const & s) const
{
ScreenBase tmpS = s;
tmpS.Rotate(-tmpS.GetAngle());
/// slightly smaller than original to produce "antialiasing" effect using bilinear filtration.
size_t tileSize = static_cast<size_t>(m_tileSize / 1.05);
m2::RectD glbRect;
m2::PointD pxCenter = tmpS.PixelRect().Center();
tmpS.PtoG(m2::RectD(pxCenter - m2::PointD(tileSize / 2, tileSize / 2),
pxCenter + m2::PointD(tileSize / 2, tileSize / 2)),
glbRect);
double glbRectSize = min(glbRect.SizeX(), glbRect.SizeY());
int res = static_cast<int>(ceil(log((MercatorBounds::maxX - MercatorBounds::minX) / glbRectSize) / log(2.0)));
return res;
}
void Tiler::seed(ScreenBase const & screen, m2::PointD const & centerPt)
{
if (screen != m_screen)
++m_sequenceID;
m2::RectD glbRect;
m2::PointD pxCenter = screen.PixelRect().Center();
screen.PtoG(m2::RectD(pxCenter - m2::PointD(m_scaleEtalonSize / 2, m_scaleEtalonSize / 2),
pxCenter + m2::PointD(m_scaleEtalonSize / 2, m_scaleEtalonSize / 2)),
glbRect);
m_drawScale = scales::GetScaleLevel(glbRect);
m_screen = screen;
m2::RectD const screenRect = m_screen.GlobalRect();
/// slightly smaller than original to produce "antialiasing" effect using bilinear filtration.
size_t tileSize = static_cast<size_t>(m_tileSize / 1.05);
screen.PtoG(m2::RectD(pxCenter - m2::PointD(tileSize / 2, tileSize / 2),
pxCenter + m2::PointD(tileSize / 2, tileSize / 2)),
glbRect);
double glbRectSize = min(glbRect.SizeX(), glbRect.SizeY());
m_tileScale = static_cast<int>(ceil(log((MercatorBounds::maxX - MercatorBounds::minX) / glbRectSize) / log(2.0)));
m_drawScale = drawScale(screen);
m_tileScale = tileScale(screen);
double rectSizeX = (MercatorBounds::maxX - MercatorBounds::minX) / (1 << m_tileScale);
double rectSizeY = (MercatorBounds::maxY - MercatorBounds::minY) / (1 << m_tileScale);
int minTileX = static_cast<int>(floor(screenRect.minX() / rectSizeX));
int maxTileX = static_cast<int>(ceil(screenRect.maxX() / rectSizeX));
int minTileY = static_cast<int>(floor(screenRect.minY() / rectSizeY));
int maxTileY = static_cast<int>(ceil(screenRect.maxY() / rectSizeY));
m2::AARectD const globalRect = m_screen.GlobalRect();
m2::RectD const clipRect = m_screen.ClipRect();
int minTileX = static_cast<int>(floor(clipRect.minX() / rectSizeX));
int maxTileX = static_cast<int>(ceil(clipRect.maxX() / rectSizeX));
int minTileY = static_cast<int>(floor(clipRect.minY() / rectSizeY));
int maxTileY = static_cast<int>(ceil(clipRect.maxY() / rectSizeY));
/// clearing previous coverage
m_coverage.clear();
@ -106,7 +126,15 @@ void Tiler::seed(ScreenBase const & screen, m2::PointD const & centerPt)
for (int tileY = minTileY; tileY < maxTileY; ++tileY)
for (int tileX = minTileX; tileX < maxTileX; ++tileX)
m_coverage.push_back(RectInfo(m_drawScale, m_tileScale, tileX, tileY));
{
m2::RectD tileRect(tileX * rectSizeX,
tileY * rectSizeY,
(tileX + 1) * rectSizeX,
(tileY + 1) * rectSizeY);
if (globalRect.IsIntersect(m2::AARectD(tileRect)))
m_coverage.push_back(RectInfo(m_drawScale, m_tileScale, tileX, tileY));
}
/// sorting coverage elements
sort(m_coverage.begin(), m_coverage.end(), LessByDistance(centerPt));

3
map/tiler.hpp
View file

@ -40,6 +40,9 @@ private:
size_t m_tileSize;
size_t m_scaleEtalonSize;
int drawScale(ScreenBase const & s) const;
int tileScale(ScreenBase const & s) const;
public:
Tiler(size_t tileSize, size_t scaleEtalonSize);